This Whatman™ high performance 22 x 80mm cellulose extraction thimble is produced from high-quality alpha cellulose cotton linter. It has excellent mechanical strength and retention. It is a standard single thickness thimble with a wall thickness of approximately 1mm (10.0 µm nominal particle retention). The high purity of the materials ensures reliable and reproducible analytical results. Dimensions: 22 x 80mm. 25/Pack. Whatman™ #: 2800-228.